I disagree on the premise.
With Derby, I’d agree that they were predicted to finish sixith but to get to the playoff final beating Marcos Leeds was an achievement.
With Chelsea, first year they were predicted to finish sixith however finished fourth and got into a FA Cup Final. Source on prediction
Your Premier League predictions: How your table for 2019-20 looks - BBC Sport
The next season was not great although part of me thinks Covid derailed them a bit in December but that squad was improved from when he took over and eventually won the Cl while not under him.
Everton was a train wreck but if you look at PPG, Sean who is seen as a competent manager hasn’t really improved it that much.
I agree on the point but he has a good track record at getting a lot from younger lads which fits our model quite well. Time will tell but I do think it’s harsh to write him off when arguably our best manager was struggling to get a job when he came back with the graph looking very much like this